Mary Pratt is heard on a recording of the 911 call placed shortly after midnight the night Cassaundra Pell, 23, and Robert Pratt, 24, were killed, telling the dispatcher she "doesn't know" when asked if anyone there needs an ambulance.

"I don't know, I don't know. I would say maybe..." she cried.

Pratt, calling from her car outside, was unable to give the dispatcher the address of the house, but said: "Just get ahold of officer Pell and ask him, it's on North Main Street."

Cassaundra Pell was the daughter of Plainwell Public Safety Officer James Pell.

911 Call: Mary Pratt speaks with dispatcher Mary Pratt, mother of the Robert Pratt, speaks to an Allegan County police dispatcher on the night Robert and his girlfriend, Cassaundra Pell, were found dead at their home on June 18, 2013.

On the recording, Pratt tells the dispatcher she had picked up her son earlier in the day to "comfort him because he was having a bad day," and that she left when Cassaundra Pell returned to the house she shared with Pratt's son.

"I didn't want to go in there because they were fighting," she said.

The recording of the 6-minute encounter ends when a police officer arrives and makes contact with Mary Pratt.

The Allegan County Sheriff’s Office is investigating the deaths, but in a news release said it appears Robert Pratt shot Pell, 23, and then turned the gun on himself.

Both were dead at the scene of Cassaundra Pell's home in the 500 block of N.Main Street.